http://www.cnr.it/ontology/cnr/individuo/prodotto/ID201864
Inhibiting effect of alpha(s1)-casein on A beta(1-40) fibrillogenesis (Articolo in rivista)
- Type
- Label
- Inhibiting effect of alpha(s1)-casein on A beta(1-40) fibrillogenesis (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.bbagen.2011.11.010 (literal)
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Carrotta R; Canale C; Diaspro A; Trapani A; San Biagio PL; Bulone D (2012)
Inhibiting effect of alpha(s1)-casein on A beta(1-40) fibrillogenesis
in Biochimica et biophysica acta. G, General subjects (Print); Elsevier, Amsterdam (Paesi Bassi)
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- Carrotta R; Canale C; Diaspro A; Trapani A; San Biagio PL; Bulone D (literal)
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- ISI Web of Science (WOS) (literal)
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- CNR, Inst Biophys, I-90146 Palermo, Italy; Italian Inst Technol, I-16163 Genoa, Italy (literal)
- Titolo
- Inhibiting effect of alpha(s1)-casein on A beta(1-40) fibrillogenesis (literal)
- Abstract
- Background: alpha(s1)-Casein is one of the four types of caseins, the largest protein component of bovine milk. The lack of a compact folded conformation and the capability to form micelles suggest a relationship of alpha(s1)-casein with the class of the intrinsically disordered (or natively unfolded) proteins. These proteins are known to exert a stabilizing activity on biomolecules through specific interaction with hydrophobic surfaces. In the present work we focused on the effect of alpha(s1)-casein on the fibrillogenesis of 1-40 beta-amyloid peptide, involved in Alzheimer's disease.
Methods: The aggregation kinetics of beta-peptide in presence and absence of alpha(s1)-casein was followed under shear at 37 degrees C by recording the Thioflavine fluorescence, usually taken as an indicator of fibers formation. Measurements of Static and Dynamic Light Scattering, Circular Dichroism, and AFM imaging were done to reveal the details of alpha(s1)-casein-A beta(1-40) interaction.
Results and discussions: alpha(s1)-Casein addition sizably increases the lag-time of the nucleation phase and slows down the entire fibrillization process. alpha(s1)-Casein sequesters the amyloid peptide on its surface thus exerting a chaperone-like activity by means a colloidal inhibition mechanism.
General significance: Insights on the working mechanism of natural chaperones in preventing or controlling the amyloid aggregation. (literal)
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